Machine for making continuous pipes.



3. BooK-BEY. MACHINE POB. MAKING GONTINUOUSl PIPEVS.

.I APPLIUATIOHFI'ILED BEPT.3,1908. y l 938,223. Patented-oet. 26, 1909.

l'i La rif.,NT-.4 OFFICE.,

` ''miran13:1' F. Doorman-ibn sama-Monica; emaroama.

MACHINE roza MAKING com-muses ',rrrns.-

new and useful Machine for Making Con` f-tinuous Pipes, -of which the following is a .f speclfication. p This -mvention relates tov improvements *ent No. 536,376, dated March 26, v1895. f .An-important .object of the present invention is -to provide means for smoothing and polishingthe interior of the pipe. 1 5 Another object of the invention is to rovide'means for smoothing the exterior o the plpa Another object ofthe invention is to eliminate the liability of cracking of the pipe due to strain produced on the pipe by the moldmg a' paratus in the motion-thereof.v f, A urther object ofthe' invention isfto im prove the operating mechanism `f Shown Vin lthe above mentioned patent .in such manner` tical-sectionthrou h the rear, part of the' casing of' the machlne.

#The machine comprises a tubular bodyor casing 1 .mounted onv wheels 2, 'of which four are-preferably provided,- arranged in pairs, the wheels of -one pair .being at the respective sides of the machine and 'near-the fr'ont end thereof and the twov wheels of the other pair being' at the respective sides of the machine, l

intermediate the ends thereof. The pipe forming apparatus is at the vrear e end' of the'tubularcasing and comprises aworm Aorv screw einher" 4 carried by the shaft'5"'which extends-'longitudinally and axially of the casingy-beiiigjournaled ad#l acent' to' 'the' 'said wormin La' s plate v 6 z which extends 'across the l tuhularfcasmg and closes @the molding chamber een theffmne and thereof, the fdr'ward'eend oflsaid Shaftbeing journaledfi-n a bracketl Swextendingfrsvertlg i ycally at' the front: endro'f -`the .tubular -f casing'.

v'Specificationof Lettersatent. Application led September 3,1908. Serial No 451,609.

V"en -fithe type'of machine shown in my 'Pat- `that a smooth, even motion will be produced.

.'tneans' of the :draw barg2 1;-, Said ishaft '5; carries.nearaitsjforward end a' bevelgearv10, engagedloyuufbevel"gear,11-v

near its upper .end in a vertical frame= 1;3"".- which extends .upwardly from the' bracket 8. j In an upward extension 14 ofv the 'said Iframe is journaled a cross-shaft15 carrying' f. a fly wheel 16 provided with a crank-handle" 1,7, said cross-shaft l5 carrying a bevel wheell l18 engaging with the bevel wheel 19 on the lupper end of thevertical shaft l2 so that by operation of the crank handle 17 the shafts 15, 12, 5 are operated to turn the worm', the-1 liy Vwheel 1.6 serving to balance o'reteadyv-the,

movement.

has at its upper end a cross-piece 20 4 serv-"1.

ing as a handle for holding the machine with* one hand while the crank handle is-operated by'theother hand. Shaft 5 'also Carries a bevel gear 21 engaging a bevel gear 21i""on shaft 2 of front wheel'2-inorder to'dause forward traction of the"machiriefl by tire-mark` l' ual operating means. The `wormvo1 sc'rew fl 4 extends in the-molding chamber 9 andi, fits snugly within the casing leso thatits'threedsj work close to or against the lsidesofthe cas,-

ling. Above the forward end of'this .worm

-or screw Vthe casing has a feed openingv over which -is placed a feed hopper 22 for .the

reception tof the cement or material to--}be moldedrinto pipe. A

The tubular' casing l has aslight 'rearward'iare and extends rearwardly'beyond the rear end vof thescrew member-4 to-t aroundI the formed cement pipe and support 'ib-temporarily. A ,core 27. extends rear" Awardly and axially; from the 'screw' member,...

y-porarily #sustain the same'and-by its rotary motion aid-.in the formation and-compacting of the pipe.' Said core lis preferably "flexible ;to enable it-to accommodate -ltself'to-l any Jslight Idei-lections in the relative directions struction l:A `follower member 24 is connect- #ed'fto core-member 27 or in case said core4 4:member bis, of elastic material as stated, to lthe rear end-of the screwmember 4, as by the connect-ion beingmade throu'ghga swiv fenablesithecoreandserew Without rotetingf -thef follower member 24'.

A:they V lat-ter* forward; The

member 24 are bothcylindrlcal and substantially of the same diameter,and the forward end of the follower member is tapered, as

shown, to enable it to move within the ce? 'ment tube. without scraping or roughen-ing the surface. Means are also provided for smoothing and pressing andcompacting the other face of the cement,` pipe, said means consisting ofva sleeve 28 surrounding the rear end of the tubular casing 'and having an annular flange 29 whose inner diameter 1s substantially the same as that of the rear end of the casing, said sleeve.28 carrying an annular gear 30'engag1ed by a gear wheel 31 on a .side shaft 32, w'ich at its'forward end carries a gear 33 engaged by a gear 34 on the axial shaft 5 aforesaid, so that the sleeve 28 is continuously rotated in the operation of the machine. A shield 35 attached to tubular casing 1 'surrounds the rotating sleeve 28, to enable it to rotate without undue friction.

The operation is as follows: Themachine being placed in the ditch where the pipe is to be formed n .9maand cement being continuously or intermittently supplied to thehopper 22; crank handle 17 is operated continuously to turn the screw member, which forces the cementfalling onto it from the hopper, backwardly into the tubular .casing forming a cement pipe in the space between the core member 27 andlthe rear .fportion of the tubular casing. As the pipe so formed is ejected by the pressure from the tubular casing and rests on the ground, ,the further operation of the machine causes a forward reaction on the machine tending to advance it in propgrtion as the pipe is formed, the machine ing guided and held in proper position by means of the handle 20. vThe positive traction means 21, 21" also serves to propel the machine forwardly, this being especially necessary with large pipe. At, the same time the core member 27 by its ro' tary motion compacts and molds the pipe formed. This rotary operation in.' connection with theforward movement is liable `to leave a riiing or helical formation on the inner surface of the' pipe, and to remove this formation and leave the interior of the pipe in a smooth, polished condition the follower 23 is provided, which, being,

held from rotation, and frlctonallyj ,contacting with the interior of the pipe, smoot-hs out thel riiing and gives a surface which presents minimum friction to the fluid assing in the pipe. The oute'l` surface o the pipe'is smoothed andpressedcat the same time by the rotating motioniof the flange ring 29 on the outer sleeve 28. As the pipe leaves the outward supporting casing 1, it is liable to be slightly cracked -byl the temorary removal of support, and the outer orming ring 29 aforesaid engages the cem'e'nt pipe at this moment to 'immediately close e cracks so formed and eoihpress' the cement intogcompact,`sol1d condition. l/VhatI claim 1s:

,1. In a' machine for makingva 'continuous pipe, the combination with' a tubular casing,'

of a worm therein, means for feeding cement to. the worm,`and a cylindrica1-core.member connectedand extending rearwardly.. from' Vthe worm means for rotatin i core membenand a follower aving' a swivel.

the' wormy and cnnnection with the rotating worm, 'and adapted to nonrotatably engage andsmQth the interior ofthe pi e, said fellower-havlng v acylindrical body o substantlally the samedi diameter as the core member.

2.` In a machine for making 'fa continuous pipe, the combination with a' tubular casing,

of a worm therein, means for feeding'cement to the worm, a cylindrical core member iconnected and extending rearwardlyrifrom'fthe worm, means for rotating the worm and core member, and a follower havingazswivel connection with the rotating worm, and adapt-a ed to non-rotatably engage and smooth' the. interior of the pipe, said follower having a cylindrical body of substantially the same. diameter as the core member, and the :tor-

warfd end of said followerbeing, ta ered. gln'acontinuous 1pc mach1ne,'t e combination with atubu ar casing, ofA a .worm

therein, means for supplying cement tov said,V

worm, means for rotating said worm, the

rear end of the tubular casing extendingj Y temporary support for the cement pipe, and v rearwardlybeyond the said worm to forni a an outer member rotatably mounted on the tubular casing ing rearward y of the discharge opening of the tubular member to temporarily surround the cement pipe as it issues from the' tubular casing, and means for rotating' said oute member for the purpose set forth.

I 4."`In a continuous ipe machine, the com- `bination with a tubu ar casing, of a worm therein, means kfor supplying cement to said worm, means for rotating said worm,l the and having a portion extend losv rear end of the tubular casing extending rearwardly beyond the said worm to forma temporary supgprt for the cement pipe, and an ou'ter mem r rotatably mounted on the tubular casin and having a vportion extending rearwar y of the discharge opening of t e tubular member to temporarily surround 'the cement pipe as it issues from the tubular casin means for rotating said outer member for .t e purpose set forth, and a shield surroundin the tubu ar casing. l

5. In a mg'chine for making a continuous and extending rearwardly from the worm,l

said outer member and attachedl to means for rotating the worm and core mem- 13,0

pipe, the combination with a tubular casing, i

ber, a follower having a swivel connection i In testimony whereof, I have hereunto set with the rotating Worm, and adapted to no1.:l my hand at Los Angeles7 California, ibis 10 rtatably engage nd smpoth .the nerior gf 26th day of August, 1908.

t e pipe, pairs o Whee s connecte tot e I tubular casing to support the same, and a ROBERT F' DOCKERY" connection between the worm-rotating means In presence .ofanda pair of said Wheels to move the ma- GEORGE T;,HACKLEY,

chine forward. v FRANKL. A. GRAHAM. 

